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High chroma and excellent color consistency across production batches.
Outstanding UV stability and weather resistance for long-term outdoor performance.
Optimized particle size distribution for superior dispersion in aqueous and solvent-based systems.
Low oil absorption enabling high loading capacity and improved formulation efficiency.
Non-hazardous, REACH-compliant, and free of heavy metals regulated under EN 71-3.
Architectural coatings including exterior masonry paints and stucco finishes.
Cementitious products such as colored concrete pavers, tiles, and precast elements.
Plastic masterbatches for construction profiles, agricultural films, and industrial containers.
Roofing granules and asphalt-based coatings requiring thermal and lightfast stability.
Industrial maintenance coatings for steel structures and infrastructure projects.
| Chemical Type | α-Fe₂O₃ (Hematite) |
| Product Form | Dry powder, free-flowing |
| Appearance | Red-brown fine powder |
| Primary Applications | Coatings, construction materials, plastics |
| Key Features | Lightfastness: ASTM D4303 Class I, Weather resistance: ISO 11341 PASS (1000 h QUV) |
| Benefits | Enhanced opacity, low dust generation, easy wetting and stabilization |
| pH (10% aqueous suspension) | 6.5 – 8.0 |
| Volatile Matter (105°C, 2 h) | ≤ 0.5% |
Q1: What are the primary application areas for Nubiola R-5501?
A: Nubiola R-5501 is widely used in architectural coatings, industrial maintenance paints, concrete colorants, and plastic masterbatches where high opacity, excellent weather resistance, and consistent reddish-brown hue are required.
Q2: Is R-5501 suitable for use in water-based systems?
A: Yes — R-5501 is surface-treated to ensure good dispersibility and stability in both water-based and solvent-based formulations, including acrylic emulsions and alkyd resins.
Q3: How does R-5501 compare to standard iron oxide red pigments in terms of tinting strength and dispersion?
A: Due to its controlled particle size distribution and optimized surface chemistry, R-5501 delivers higher tinting strength and more uniform dispersion compared to conventional iron oxide reds, reducing grinding time and improving batch-to-batch consistency.
Q4: What is the recommended dosage range for optimal performance?
A: Dosage depends on the specific formulation and desired shade intensity, but it is typically used at low concentrations — generally ranging from 0.1% to 2% by weight in final products — with adjustments based on substrate, binder type, and application method.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
